> Does anyone know if turning on Hiper Dispatching on a single book box machine > would make a >difference in performance?
The answer is yes, but I believe with your configuration the answer is no. Hiper Dispatch tries to dispatch the work on a subset of logical processors. Since you only have 4 CPs those are the only ones you can be dispatched on anyway so you get the effect of Hiper Dispatch by default. If you had more processors you'd see a benefit in using Hiper Dispatch. OTOH it probably won't hurt to turn it on to try it. Bob Shannon Rocket Software ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN